| Discovery[1] | |
|---|---|
| Discovered by | C.-I. Lagerkvist |
| Discovery site | La Silla Obs. |
| Discovery date | 22 August 1979 |
| Designations | |
| (5088) Tancredi | |
Named after | Gonzalo Tancredi (Uruguayan astronomer)[2] |
| 1979 QZ1 · 1982 DP6 1985 RS3 | |
| main-belt · Themis[3] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 37.60 yr (13,733 days) |
| Aphelion | 3.5929AU |
| Perihelion | 2.6160 AU |
| 3.1045 AU | |
| Eccentricity | 0.1573 |
| 5.47yr (1,998 days) | |
| 225.83° | |
| 0° 10m 48.72s / day | |
| Inclination | 0.5844° |
| 5.7375° | |
| 84.766° | |
| Physical characteristics | |
| Dimensions | 12.81 km(derived)[3] 15.939±0.137 km[4][5] |
| 5.0591±0.0001h[6] | |
| 0.0695±0.0122[4][5] 0.08(assumed)[3] | |
| C[3][6] | |
| 12.36±0.07(S)[6] · 12.5[1][4][5] · 12.81[3] | |
5088 Tancredi, provisional designation1979 QZ1, is a carbonaceous Themistianasteroid from the outer region of theasteroid belt, approximately 15 kilometers in diameter. It was discovered on 22 August 1979, by Swedish astronomerClaes-Ingvar Lagerkvist atESO'sLa Silla Observatory in northern Chile.[7] It is named after Uruguayan astronomerGonzalo Tancredi.[2]
Tancredi is a darkC-type asteroid and member of theThemis family, a dynamical family of outer-belt asteroids with nearly coplanarecliptical orbits. It orbits the Sun in theouter main-belt at a distance of 2.6–3.6 AU once every 5 years and 6 months (1,998 days). Its orbit has aneccentricity of 0.16 and aninclination of 1° with respect to theecliptic.[1] As noprecoveries were taken, the asteroid'sobservation arc begins with its discovery observation in 1979.[7]
In February 2009, a rotationallightcurve ofTancredi was obtained from photometric observations byGonzalo Tancredi at theLos Molinos Observatory near Montevideo, Uruguay. It gave arotation period of5.0591±0.0001 hours with a brightness amplitude of 0.31magnitude (U=3-).[6]
According to the survey carried out by theNEOWISE mission of NASA'sWide-field Infrared Survey Explorer,Tancredi measures 15.9 kilometers in diameter and its surface has analbedo of 0.07,[4][5] while theCollaborative Asteroid Lightcurve Link assumes an albedo of 0.08 and calculates a diameter of 12.8 kilometers using anabsolute magnitude of 12.81.[3]
Thisminor planet was named afterGonzalo Tancredi (born 1963), the Uruguayan astronomer who also obtained the body's first rotational lightcurve. In 1993, he did his PhD atUppsala Observatory, Sweden, and is now a professor of astronomy atUruguay University and an active member of theIAU.[8][9]
Tancredi was also a director of theLos Molinos Observatory (2004–2012).[9] Using both observations and theoretical modeling, he works on the dynamical and physical evolution of comets and their interactions with minor planets in the Solar System.[2] The approved naming citation was published by theMinor Planet Center on 1 September 1993 (M.P.C. 22506).[10]
